Musnad Ahmad 27:1862

Abu Kamil narrated to us, Hammad—meaning Ibn Salamah—narrated to us, Farqad al-Sabakhi informed us, from Sa'id ibn Jubayr, from Ibn Umar: "The Prophet, may Allah bless him and grant him peace, anointed himself with oil that was not scented, while he was in the state of Ihram."